Mold-jarring device



J. R. DUNBECK MOLD JARRING DEVICE" Sep t 1L'1928.

Filed Nov. 9, 1925 2 Sheets- 5km 2 tion with a fluid pressure actuated j olting device whereby a value controlling the supply of Patented Sept. 11, 1928.

v UNITED, stares PATENT FF JOSEPH R. DUNBECK, or nocnns'rna, NEW YORK, assieivon TO THE SYMINGTON corr- PANY, on NEW YORK, N. Y., A ooaronarron OF MARYLAND.

MoLn-JAR-mive DEVICE.

Application filed November 9, 1925. Serial IT 68918 This invention relates to control mechanism for fluid actuated devices and more particularly to such mechanism for mold jarring devices. f

The principal object of my invention, generally considered, is the provision of a device which effects'the automatic shut off of mechanism particularly adapted for arring molds after a predetermined number of vibrations or jars have been delivered. to sald molds.

An objectof my invention is the provision of a control mechanism adapted for associafluid'to said device is held open during the desired operation of said device by means of a latch engaging an operating handle of said va ve and after a predetermined motion of said device, said latch is automatically released to allow the valve to close and stop the operation of the'device.

Another object of my invention is the provision of control mechanism for a fluid pressure actuated device Which, when said device is put in operation, will oscillate a pivoted lever by means of a connection between said device andlever to turn a ratchet wheel step by step by means of a pawl on said lever and after a predetermined number of oscillations will ca use a cam portion on said ratchet wheel to move a latch to release position and permit a spring actuated operating handle on the in ain fluid pressure supply valve to return to closed position and stop the operation of the device. r j

A further object of my invention is the provision of a guide adapted for use with control mechanism forfluid pressure actuated jolting devices employing a controlling ratchet wheel for effecting the speed of operation of said wheel by determining the number of,

teeth through which the wheel'is turned at each vibration of the operating means for said wheel. 7 v

Other objects and advantages of the invelntion relating to the particular arrangen'ient and combination of the parts-will become apparent as the description proceeds.

Referring to the drawings illustrating my invention, the scope whereof is defined by the ap ended claims:

Figure 1 is a sideelevation of anembodiment of my invention.

' Figure 3 is a plan 'view manner as by means of a bracket portion Figure 2 is an end view ofthe embodiment of my invention illustrated in Figure 1, a portion thereof being shown in section.

partly in section on the line 3-3 of Figure 2. y

Figure 4 is afragmentary view of the other end of the apparatus from that illustrated in Figure 2.

Figure 5 is'a fragmentary sectional view on the line 5-5 of Figure 1 looking in the direction of the arrows; v a

F i gurefi is a fragmentary elevational view partly in section on the line 66 of Figure 5.

Ordinarily, air jolt machines or machines for jarring molds are controlled by an operator who turns on'theair, admitting the same to a v olting cylinder from which it is automatically discharged, the device being permitted to operate until the operator thinks the mold is properly jolted. This invention is designed to do away with the close personal supervision necessitated when not utilizing any automatic control apparatus in connection with the operation of the olting cylinder.

Referring now to the drawings in detail,

like parts being designated by like reference I characters, a fluid pressure supply pipe 1 is shown provided with a control valve 2.- Said valve is provided on the stem thereof with an operating handle 3 for effecting the opening or closing thereof. In the embodiment illustrated, fluid pressure is admitted from any suitable source of supply (not shown) and travels from the left, as illustrated in Figure 1, through the valve 2 and from thence to the mold jarring device or cylinder 4 which effects thevibration or reciprocation of aplatform or table 5 upon which may be placed molds or other objects which it is desired to jaror jolt. Any suitable means maybe employed for effecting the reciprocation, jarring or jolting of the platform or table 5, for eX- from a supporting frame 6 in any desired l thereof connected to the main portion of the frame 5 by bolts 8 or other connecting means. The operating handle 3 of the valve 2 is resiliently urged to closed position in any desired manner, for example, by means of a helical or coil spring 9 surrounding a portion of the valve stem, engaging at opposite ends thereof a portion of the operating handle 3 and the casing of the valve 2. The operating handle 3 is held in open position by a latch or other retaining means 10, preferably engaging in a recess 11. formed on the underside ofthe operating handle, The latch 10 is preferably beveled on 1ts upper surface, as shown in Figure 1, and slldable in the U-shaped upper portion of the frame 6. being retained in its upper or locking position by means of a coil or helical spring 12 surrounding said latch 10 and engaging a collar 13 thereon. Said collar 13 may be immovably connected with the latchlO in any desired manner as by means of pin 14 inserted through the collar and latch, as illustrated particularly in Figure 2. As will be understood from a consideration of Figure 2 particularly, the spring 12 is held in compression between the collar 13 and the horizontal portion 15 of the frame-or standard 6 and urges the latchlO to upper or locking position so that the operating handle 3 may be turned counter clockwise as viewed from the top thereof from the closed position of the valve 2 where the handle 3 lies parallel to the pipe 1 to open position of the valve, as illustrated, with the beveled end of the latch 10 engaged in the recess 11 insaid handle.

'Additional guide means for the latch, an

angular bracket 16 with its upright portion connected to the adjacent portion of the frame 6 and with its horizontal portion perforated for slidably engaging the latch 10, may be provided. 7

Preferably rotatably mounted on the frame or standard 6 or between said frame and adjacent frame portion 17 upon a pivot bolt 18 therebetweeu is a toothed or ratchet. wheel 19. The lower endor base of the supporting memberor frame 17 as well as the base of the frame 6 may be connected to the floor or ground in any desired manner as by means of bolts 20. The ratchet wheel 19 is intended for movement in only one direction and for that reason a dog 21 is provided pivoted 7 upon a bracket 22 mounted on the frame 17 by means of bolts 23 or the like. Said dog 21 is preferably pivoted upon a pivot bolt. or the like 24- provided on said bracket 22 andresiliently held in engagement with the teeth 25 on the ratchet wheel 19 by means of a spring 26 connected between a pin or extension 27 from the dog 21 and a, similar extension 28 from the bracket 22. Because of this arrangement, the ratchet wheel 19 is allowed to rotate in only one direction, that is, clockwise,as illustrated in Figure 1.

the connection between the table 5 and the 7 connecting. rod 30 takes the form of an angular extension 30 on said connecting rod underlying an edge of the table 5 and extending between said edge and a lug portion 32 so that reciprocating motion of said table is imparted to said connecting rod 30 and from thence to the operating lever 29. For-guiding said connecting rod 30 and preventing its disengagen'ient with the table 5, a guiding bracket 33 is provided. This guiding brackct 33 may be connected to the frame or standard. 17 by bolts. or the like 34 and formed with its end bent around the connecting rod 30., as indicated at 35, thereby properly guiding the same and preventing its disengagement from the table 5. a

. Pivotallyconnected near theouter'end of the lever 29 by means of a pivot bolt or the like 36 is a pawl 37, the operative end of which is pressed into engagement with the. teeth 25 of the ratchet wheel 19 by resilient means such as the flat or leaf spring 38mount ed on said lever 29 as by means of stud 39. It will be apparent that, on account of this construction, the pawl 37 is adapted for turning the ratchet wheel 19 in a clockwise direc tion upon the downward reciprocation of the table 5 but will slide over one or more of the teeth 25 of the ratchet wheel .19 upon theupward reciprocation of said table. In order to regulate the number of teeth throughwhich the ratchet wheel 19 is turned at each reciprocation of the table 5, a guide 40 is provided adjustably 17 as by means of bolts 41 engaging in apertures in said guide and in corresponding apertures 42 in said standard. The upper portion of the guide 40 is formed with an edge 43 substantially coaxial with the ratchet wheel 19 and the pawl 37 is provided with a pin llextending laterally therefrom so asto engage and ride over the bracket 40 along the edge 43 to disengage saidpawl 37 from the teeth. 25 of the ratchet wheel 19 andlimit the number of teeth through which the pawl 37 will turn theratchet wheel 19 at each reciprocation of the table 5. Forexample, when the bracket 40 is adjusted, as illustrated in Figure 1, it will cause the pawl 37 to disengage from the teeth 25 after slipping over one tooth and thereby cause the ratchet wheel 19 to be moved only one tooth for each reciprocation of'the table 5. Hit were desired to effect a more rapid operation of the ratchet than one of said teeth 25.

In order to cushion the motion of the operating lever 29, the same s preferably extended beyond the pivot bolt 181and a coil spring 45 providedbetween the same and the bracket 22, ora U-shaped portion l6 thereof, Said coil spring l may be positioned in compression in any desired manner between said portion 46 and the lever 29 as by being mounted on upright 'pin 47 onfsaid lever and pin 48 on the U-shaped portion 46, said pin 4C8 preferably being threaded with respect tothe U- shaped portion 46 to facilitate assembly of the spring e5 in place. I

For effecting the unlocking or release of the operating handle 3,.a stop or cam block 49 is formed on the ratchet wheel 19, as illustrated particularly in Figure ,6. Said cam block 49 may be'connected with sa d ratchet. wheel 19 in any desired manneras by means of pins or bolts 50 and the cam or rounded edge thereof is formed near the teeth 25 or outer edge of theratchet wheel 19' and adapted to engage a pivotally mounted cam or latch ac 'tuating member 51 upon a predetermined motion of the ratchet wheel 19. The cam 51 may be pivoted on bolt 52, which bolt may be sup ported in any desired manner as by extending through an aperturein the guidebracket 33 and a corresponding aperture in a bracket 53 connected to fra'me or standardil in any desired manner as by bolts 54-, as illustrated particularly in Figure '5. The pivoted cam 51 isformed with an npwardlycurved end portion 55: over which the portion 49 rides after a'predetermined motion of the ratchet wheel 19 thereby turning said cam counter clockwise, asviewed in Figures 1 and 6, and causing the lower, curved end portion 56 to engage a transverse extension 57 from the latch and thereby, Gl'l GC iIfhG downward movement of-said latch 10 to release orunlocking position. Said extension 57in the embodiment shown passes through an aper ture 58 in the frame or standard 6.

The operation of the aforedescribed controlling device may be as follows. The

ratchet wheel 19 is turned by hand in a clockwise direction past the dog '2lzand pawl 37 until it'is positioned so that the stop or cam block 49 is a given number of teeth in advance or counter clockwise beyond the pivoted cam 51 corresponding to the number of vibrations or jolts desired to be given to the platform or table 5 and the molds or other art cles thereon. he guide 40 is likewise adjusted so that it permits the sliding over of one or more teeth by the pawl 87-as desired in accordance with the desired speed of'operation of the ratchet wheel 19. The operating handle 3 for thevalvc 2 is movedcounter elockw1se-,'as viewed from above, from @POSI- tion where 1t hes along the supply pipe 1 through approximately 90 to a position illustrated in Figures 1 and 2 where it rides over the beveled edge of the latch 10 and is locked in position, by said latch engaging in the aperture or recess 11 in said operating handle 0. The opening of the valve 2 by the turning o; the handle 3, as aforedescii'ibed, Wlll effect the operation of the j olting device'by admitting compressed air or fluid to the cylinder 4: and thereby cause a reciprocation or goltmg of the table .5. This reciprocatory motion is "transmitted to the-operating lever 29 from the 'table 5 by means of the connecting rod and through the pivot bolt36' and pawl 37, step by step motion is imparted. to the ratchet wheel 19 by the, engagement of said pawl 37 with the teeth 25 thereon. When the ratchet whecl19has turned so that the cam block 49 thereon rides over-the curved portion on the pivoted cam 51, the said cam 51 is pushed downwardly thereby forcing the latch- 10 through engagement with the extension. 57 therefrom to release position,thereby allowing the spring 9 to return the valve and operating handle'thereof-to closedposition and stop the operation of the mold jarring deice and the reciprocation of the table 5. i

It will be apparent that by virtue ofthe aforesaid mechanism, an operator may set the controllingratchet- Wheel for the desired number of jolts, to be delivered to the ,mold, open the valve 2 and leave the machine to operate, as it will continue to operate only until the ratchet Wheel 19 has been turned the predetermined amount when the handle 3 is automatically released and the mainvalveaclosed thereby "stopping the device automatically at the desired tim'e.-

H'aving described my invention, what I claim is: e c Q 1. The combination with a fluid pressure actuated jolting device, of a valve controlling the supply of fluid" pressure thereto, spring means tending to close said valve, means for manually opening said valve, latch neansfor retaining-said valve open and means operated by/move'ment of the jolting device'for releasing said lat-clrmeans and allowing said spring means to close. the valve;

2; The combination with a fluid pressure actuated jolting device, of a valve controlling the supply of fluid pressure thereto,

resilient means for normally retaining said valve closed, manual means for openingsaid valve, means for retaining said valve open and adjustable means actuated'by motion imparted from the jolting device for releasing said retaining means and allowing said resilient means to act and close the valve.

3. Thecornbination with a fluid pressure actuated jolting device, of a valve controlill) ling the supply of fluid pressure thereto,

when the lever is moved in said direction,

and slide over said ratchet wheel when the lever is moved in the opposite direction, a portion on said ratchet wheel engageable with the retaining means to release said means after a predetermined movement of the ratchet wheel and a connection between the jolting device and lever for effecting movement of the ratchet Wheel by oscillation of the lever. r 1

4. The combination with a fluid pressure actuated jolting device, of a valve controling the supply of fluid pressure thereto, resilient means for normally retaining said valve closed, manual means for'opening said valve, means for retaining said valve open, a ratchet wheel rotatably mounted adjacent said valve, means engaging the teeth'of said Wheel to permit rotation in one direction only, a lever pivoted coaxially with respect to said wheel,,a pawl pivoted tosaid lever and adapted to engage said ratchet wheel and turn it in the permitted direction when the lever is rotated in said direction and slideover said wheel when the lever is rotated in the opposite direction, a cam portion on said ratchet wheel engageable with the retaining means to release the same after the pawl on the lever has moved the wheel a predetermined number of teeth, and a connection between the jolting device and lever for oscillating the lever to effect movement of the ratchet wheel for releasing the retaining means. 1 a a 5. The combination with a fluid actuated joliing device, of a] valve controlling the supply of fluid pressure thereto, a spring connected to said valve for normally retaining the same closed, an operating. handle for opening said valve, a latch engaging a portion of said handle for retaining said valve open, an adjustable means actuated by motion from'the jolting device for withdrawin g said latch to release the handle and allow the springto act and close the valve after apredetermined amount of motion of the jolting device.

A .6. The combination with a fluid pressure actuated jolting device, of a fluid pressure valve controlling the supply to said device, spring means associated with said valve for normally closing said valve, a latch engaging said. handle for retaining said valve open, a ratchet wheel rotatably mounted near said valve, a dog engaging the teeth of said wheel to permit rotation thereofin one direction only, a lever pivoted coaxially with respect to said wheel, a pawl pivoted to said lever and engaging said ratchet wheel forturning the same in the permitted direction when the lever is oscillated in said direction and for sliding over said wheel whenthe lever is oscillated in the opposite direction, a cam portion on said ratchet wheel, a pivoted cam engaged by said cam portion andprovided with a portion engaging said latch for moving the same to release position when actuthe same to closed position, an operating handle on said valve for opening the same, said operating handle being provided with a recess, a slidable latch mounted in saidframe and engagingin the recess of said handle for retaining the same in open position, resilient means for retaining said latch in locked position. a ratchet wheel rotatably mounted on said frame, a lever pivoted to said frame, a pawl pivoted to said lever and springpressed into engagement with said wheel for turning the same in a given direction upon oscillation of said lever, a connection between said jolting device and lever for oscillatingsaid lever,

and a guide adjustably-mounted on said frame for causing the pawl to turn the ratchet wheel through one or more teeth as desired at each oscillation of the jolting device.

8. The combination with a fluid actuated jolting device, of a valve controlling the supply of fluid pressure thereto, resilient means for normally retaining said valve closed, a frame for supporting saidvalve, manual means for opening said valve.. retaining means mounted on said frame for holding the same in open position. a ratchet wheel mounted on said frame, a lever'mounted on said frame and provided with a pivoted spring-pressed pawl engaging said ratchet wheel for turning the same step by step to finally cause the engagement between a portion thereof and the latch for releasing the opening handle and allowingthe valve to close, a connection between said opening lever and jolting device for effecting the oscillation of said lever and resilient means betweena portion of said lever and the frame for cushioning the operation of said lever.

9. Controlmechanism comprising a fluid presure valve, resilient means tending to close said valve, a handle on saidvalvefor opening thesame, a latch engaging saidhandle for holding the same in open position, a

ratchet Wheel mounted adjacent said valve and provided with means'thereon engageable with said latch for moving the same to unlocked position and means engaging the teeth of said ratchet wheel for effecting the step by step motion thereof whereby the closing of said valve is efiected after a predetermined movement of the ratchet Wheel.

10. Control mechanism for a fluid actuated device, comprising a valve through which fluid is conducted to said device, a spring for closing said valve, an operating handle on said valve, latch means engaglng said handie for holding the same in open position, a ratchet wheel mounted adjacent said valve,

a pivoted lever provided with a spring pressed pawl thereon engaging the teethof low the valve to close after apredetermined motion of the device.

In testimony whereof I affix my signature.

JOSEPH n. DUNBECK; 

